So I am just back from skiing. 6 days. I didnt really put sun protection on except once, using a friends chapstick. Anyway, this Monday I noticed a blister on my lip, more on the inside. So I went to a local dermotologist, who lanced it and sent in a sample (results not back yet). She said 50/50 cold sore. Anyway, since then the one she lanced (3 days later) is basically gone. It never scabbed or anything. Then another blister popped up on tuesday (1 day later) near it. That has now popped on its own. Looks like it will be mostly gone by tomorrow, if not the next day. Never really had much pain. Maybe if I tongue it alot it get aggravated. But no scab, no pain to mention. And from blister to healed looks to be about 4 days. Never had a cold sore before. But seems to me that this could easily be sunburned lips. My lips were extremely dry, probably decently burnt, and certainly wind burnt. Split down the middle a little a few days back from being dry. Question is, do cold sores pop up separately like that, heal that quickly without pain and without scabbing?